Notes

No load CPU temp. is around 53 C. Brightness function keys work. Wireless and video worked out of the box.
Disable Secure boot and fast boot, Change the boot order to USB first, and save on that screen to make change
permanent.

Summary

This machine's hard disk was untouched by running Ubuntu off a USB 3.0 8G stick. The performance was good, and things just worked. A nice, portable machine for Linux.